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2003 S3 - Haldex issue?

Discussion in 'A3/S3 Forum (8L Chassis)' started by cammage08, Sep 12, 2013.

  1. cammage08
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    cammage08 Member

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    [Sep 12, 2013]
    Hi, Im reasonable new to the scene, previously owned a Mk1 Leon cupra. I purchased myself a late 03 S3 with 133k on the clock for £3250 with a PSI remap on. Excellent condition and spec, had a few tiny things that i wasnt happy with but ive soon sorted them over the 2 months ive owned it. My main issue now is the vibration im getting when accelerating through the seat/whole car when accelerating. It happens when accelerating hard 70++ in 5th and 6th and up through the gears when accelerating away hard... This is when im guessing the haldex is operating and this causing my vibration? Could it be a daft out of balance rear wheels? Ive had new tyres on the front which didnt change anything. Is there anything specific i should be checking? Other than that everything seems to function fine, goes like a rocket (a vibrating one at that) and is a dream.

    Any help at all would be great.

    Thanks

    cammage08
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  3. JUS3IN
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    JUS3IN silver sleeper

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    [Sep 12, 2013]
    hadlex engages only when the steering angle is plus 12 degrees left or right or if it senses the front wheels are slipping i think so unlikely... maybe the driveshaft/propshaft hitting the exhaust or summit!? odd that its only over 70 when ur on a racetrack of course!-)
    #2
  4. Vex182
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    Vex182 Guess what I drive...

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    [Sep 12, 2013]
    The haldex is will only kick in when it senses wheel spin, it can't predict on these first edition models. It will be running at 70 but only a very small amount of drag from the clutch pack, hence why it has to be disconnected when on a 2wd rolling road. The issue you have does not sound like haldex issues at all, possibly the rear diff or suspension issues. Maybe track rod ends or lower ball joints?
    #3
  5. Vorshprungdork
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    Vorshprungdork Active Member

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    [Sep 12, 2013]
    Probably teh rear propshaft damper, there is a thread on here already about it http://www.audi-sport.net/vb/a3-s3-...-quattro-load-vibrating-2-thousands-revs.html
    Have a read and see if it sounds like the same thing, if so tehy are about £230 fraom Audi but some dealers want to sell you a whole propshaft for about £1000. I am trying to source one just now for my 05 TDI quattro outwith the dealer network but it's not proving easy. If I get something I will post up details on teh thread above, so keep an eye out :)
    #4
  6. cammage08
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    cammage08 Member

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    [Sep 12, 2013]
    Thanks that would be great. Is it possible a thrown Rear wheel weight could cause a vibration to be felt through my seat? And yes of course the 70+ is on private roads/race tracks etc :)
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  7. Vex182
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    Vex182 Guess what I drive...

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    [Sep 12, 2013]
    The rear wheel bearing could do yeh, it would have to be wet bad though. Normally they become noisey on corners. The 2004 onwards haldex is different from ours too.
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  8. Big Al
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    Big Al A4 B7 bits for sale!!

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    [Sep 12, 2013]
    #7
  9. cammage08
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    cammage08 Member

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    [Sep 18, 2013]
    So I've had the car into Audi and its actually a misfire that I'm experiencing... Any ideas? They've apparently tried plugs and coil packs but no change?? I know my thermostat is stuck open and due for changing?
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  10. Vex182
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    Vex182 Guess what I drive...

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    [Sep 19, 2013]
    It sounds like the coil pack loom then, a few people have had to replace them on here before, the heat cycles breaks down the cables casing over time.
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  11. phil miller
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    phil miller Active Member

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    [Sep 20, 2013]
    Get the thermostat changed asap, as if its running cold it will over fuel like a ****er, and as above replace the loom and that will prob cure it dude
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  12. cammage08
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    cammage08 Member

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    [Nov 10, 2013]
    Not long after i got the car back from audi i gave the car a once over myself..... To find.... A bolt hanging from the propshaft where it joins the drive unit behind the engine!! I quickly contacted audi to explain my findings only to be told that this couldnt be my problem as its "deffinately a missfire". The lady who i spoke to said she would confirm it with the technician who had checked my car and get back to me. To me it seemed a little too obvious, a loose bolt on something that spins around is going to create a vibration im sure. So i sourced a replacement, had to travel to sheffield audi to collect the £1.74 bolt and replace it. The lady phoned back and confirmed i had an engine missfire!! Hmmmm So the bolt was changed by me, 4 hours in total and the vibration had gone. A snotty email was sent to Audi and a refund was soon on its way.....
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  13. cammage08
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    cammage08 Member

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    [Nov 10, 2013]
    Spot the loose bolt...

    Attached Files:

    #12
  14. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Nov 10, 2013]
    Sadly I am not surprised a dealer hasn't picked up on this... good work on spotting the bolt though...

    <tuffty/>
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  15. Vorshprungdork
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    Vorshprungdork Active Member

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    [Nov 11, 2013]
    Ahhem! My post 12th Sept ^^ not the damper obviously but I was in the right area was I not?
    I need a new username, clearly I am not an Audi Dork any more, at least no more than the average Audi Dealer at any rate :)
    #14
  16. cammage08
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    cammage08 Member

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    [Nov 11, 2013]
    Haha, Yep you was deffinately on the right path. I just carnt believe the cheek of them. They even wanted to investigate the supposed missfire further at an extra £200+ !! The car doesn't have a missfire....
    #15
  17. Vorshprungdork
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    Vorshprungdork Active Member

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    [Nov 15, 2013]
    Dealers have it in their power to completely ruin the ownership experience of any good car and somewhat surprisingly do so on a regular basis. Makes me wonder waht all the fuss is abiout full service history and all that, I'd much more prefer to know someone competent actually did the work :)
    Good luck with geting yours fixed, should be an easy one now!
    #16

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